It worked for them – at least for me.
I am consuming more Now on Steam on my deck than I have in a long time. Part of the reason is that I am happy with the product. If Valve ever tried to get me to repurchase games I bought on other storefronts in order to play them on my Deck, it wouldn’t work – I’d just use the Deck less, which would translate to spending less on Steam on sales and stuff during storage.
Also, I’m very impressed with the hardware and software that runs things that were never intended to run on Linux or handheld devices (or both). I got Immortals: Fenyx Rising running fine and smooth on Deck, although launching the game via Steam means it actually launches the Epic store, then the Ubisoft store, then the game’s launcher, then the game itself. It’s a ridiculous chain of products owned by a bunch of different companies, none of which offer any compatibility with Deck…but it works anyway. This is some impressive shit, man. This is my go-to example of how Deck is clearly very good at running games that aren’t natively developed for Linux. If Valve turned it into a walled garden, I wouldn’t have an example of that.